Ara es mostren els items 15-29 de 29

    • New (FeCoCrNi)-(B,Si) high-entropy metallic glasses, study of the crystallization processes by X-ray diffraction and Mössbauer spectroscopy. 

      Panahi, Seyedeh Leila; Garcia-Ramón, María; Pineda Soler, Eloi; Bruna Escuer, Pere (2020-07-16)
      Article
      Accés obert
      The role of B and Si in the formation of (FeCoCrNi) 100-x-y B x Si y high-entropy metallic glasses is studied. It is found that a content of B between 10 and 20 at% and of Si between 5 and 15 at% is able to produce a ...
    • On the validity of Avrami formalism in primary crystallization 

      Bruna Escuer, Pere; Crespo Artiaga, Daniel; González Cinca, Ricardo; Pineda Soler, Eloi (American Institute of Physics, 2006-09-30)
      Article
      Accés obert
      Calorimetric data of primary crystallization is usually interpreted in the framework of the Kolmogorov Dokl. Akad. Nauk SSSR 1, 355 1937 , Johnson and Mehl Trans. AIME 135, 416 1939 , and Avrami J. Chem. Phys. 7, ...
    • Phase-field modeling of microstructural evolution in primary crystallization 

      Bruna Escuer, Pere; Pineda Soler, Eloi; Rojas Gregorio, José Ignacio; Crespo Artiaga, Daniel (2014)
      Comunicació de congrés
      Accés obert
    • Phase-field modelling of microstructural evolution in primary crystallization 

      Bruna Escuer, Pere; Pineda Soler, Eloi; Crespo Artiaga, Daniel (2007)
      Article
      Accés obert
      One of the main routes to obtain nanostructured materials is through the primary crystallization of metallic glasses. In such transformations, crystallites with a different composition than the amorphous precursor grow with ...
    • Phonon dispersion relation of metallic glasses 

      Crespo Artiaga, Daniel; Bruna Escuer, Pere; Vallés Sales, Araceli; Pineda Soler, Eloi (American Physical Society, 2016-10-13)
      Article
      Accés obert
      Experimental data on the phase sound speed of metallic glasses show anomalies in the terahertz range, reflecting an underlying complex behavior of their phonon dispersion spectrum not yet explained. We determine the phonon ...
    • Polyamorphic transitions in Ce-based metallic glasses by synchrotron radiation 

      Duarte Correa, María Jazmín; Bruna Escuer, Pere; Pineda Soler, Eloi; Crespo Artiaga, Daniel; Garbarino, Gaston; Verbeni, Roberto; Zhao, Kun; Wang, Wei Hua; Romero Castro, Aldo Humberto; Serrano Gutiérrez, Jorge (2011-12-01)
      Article
      Accés obert
      We report here on a polyamorphic-phase transition upon application of pressure on a Ce-based metallic glass, Ce70Al10Ni10Cu10, investigated by x-ray diffraction and inelastic x-ray scattering. This alloy is found to display ...
    • Quantum computing : problems and exercises 

      Torres Gil, Santiago; Bruna Escuer, Pere; Massignan, Pietro Alberto (Iniciativa Digital Politècnica. Oficina de Publicacions Acadèmiques Digitals de la UPC, 2020-07)
      Llibre
      Accés obert
      Quantum technology is one of the most promising and challenging fields in contemporary science. Quantum computing, quantum cryptography, and more generally quantum information technologies claim that they, in the short ...
    • Role of Mo in the local configuration and structure stabilization of amorphous steels, a Synchrotron X-ray diffraction and Mossbauer study 

      Pineda Soler, Eloi; Bruna Escuer, Pere; Serrano Gutiérrez, Jorge; Torrens Serra, Joan; Crespo Artiaga, Daniel (2011-07)
      Article
      Accés restringit per política de l'editorial
      Amorphous steels are promising materials with potential structural applications. The glass-forming ability (GFA) and mechanical properties of metallic glasses are intimately related to the local structure. In Fe-based ...
    • Structural evolution of metallic glasses during annealing through in-situ Synchrotron X-ray diffract 

      Pineda Soler, Eloi; Boneu, Francesc; Bruna Escuer, Pere; Pradell Cara, Trinitat; Labrador, Ana; Crespo Artiaga, Daniel (2008-05)
      Article
      Accés obert
      In this work we study the structural evolution of Al and Fe based metallic glass compositions. The samples were obtained as ribbons by melt-spinning, their glass stability and crystallization were analyzed by calorimetry ...
    • Structural study of conventional and bulk metallic glasses during annealing 

      Pineda Soler, Eloi; Hidalgo, I.; Bruna Escuer, Pere; Pradell Cara, Trinitat; Labrador, Ana; Crespo Artiaga, Daniel (2007)
      Article
      Accés obert
      Metallic glasses with conventional glass-forming ability (Al-Fe-Nd, Fe-Zr-B, Fe-B-Nb compositions) and bulk metallic glasses (Ca-Mg-Cu compositions) were studied by synchrotron X-ray diffraction during annealing throughout ...
    • Structure and Mössbauer analysis of melt-spun Fe-Pd ribbons containing Ni and Co 

      Rekik, Hanen; Chemingi, Mahmoud; Bachaga, Tarek; Cherif, Amal; Bruna Escuer, Pere; Suñol Martinez, Juan Jose; Khitouni, Mohamed (2015-06-05)
      Article
      Accés obert
      Fe68.45Pd28.21Co1.66Ni1.66 alloy in ribbon geometry was produced by melt spinning. The microstructure of the samples was examined using scanning electron microscopy. The structural identification of the as-spun ribbon ...
    • Structure, mechanical properties and nanocrystallization of (FeCoCrNi)-(B,Si) high-entropy metallic glasses 

      Panahi, Seyedeh Leila; Fornell, Jordina; Popescu, Catalin; Pineda Soler, Eloi; Sort Viñas, Jordi; Bruna Escuer, Pere (2022-02)
      Article
      Accés obert
      New high-entropy metallic glasses were produced by adding B and Si to the Fe25Co25Cr25Ni25 high entropy alloy. Extremely hard materials were obtained by inducing structural relaxation and nanocrystallization in the ...
    • Study of crystallization process of Fe65Nb10B25 and Fe70Nb10B20 glassy metals 

      Torrens i Serra, Joan; Bruna Escuer, Pere; Rodríguez Viejo, Javier; Pradell Cara, Trinitat; Clavaguera Mora, Maria Teresa (2007)
      Article
      Accés obert
      The devitrification of the Fe65Nb10B25 and Fe70Nb10B20 metallic glasses produced by melt spinning has been studied by calorimetry (DSC), X-ray diffraction (XRD) and transmission Mössbauer spectroscopy (TMS). Calorimetric ...
    • The magnetopyroelectric effect: heat-mediated magnetoelectricity in magnetic nanoparticle-ferroelectric polymer composites 

      Llacer Wintle, Joaquin; Renz, Jan; Hertle, Lukas; Veciana, Andrea; von Arx, Denis; Wu, Jiang; Bruna Escuer, Pere; Vukomanovic, Marija; Puigmartí Luis, Josep; Nelson, Bradley J.; Chen, Xiang Zhong; Pané Vidal, Salvador (Royal Society of Chemistry (RSC), 2023-01-01)
      Article
      Accés obert
      Magnetoelectricity enables a solid-state material to generate electricity under magnetic fields. Most magnetoelectric composites are developed through a strain-mediated route by coupling piezoelectric and magnetostrictive ...
    • Thermal and structural study of nanocrystalline Fe(Co)NiZrB alloys prepared by mechanical alloying 

      Gonzalez, A; Escoda, L; Suñol Martinez, Juan Jose; Shao, G.; Arcondo, B.; Bruna Escuer, Pere (2010-01)
      Article
      Accés restringit per política de l'editorial
      Three nanocrystalline alloys, Fe75-xCox(Ni70 Zr30)15B10 (x = 0, 10, and 20), were synthesized from elemental powders in a planetary high-energy ball mill. Their microstructure, magnetic properties, and thermal stability were ...